AR loading, compiled from reading about 1000 posts here on the subject, but largely confirmed by myself:
1. Get ASC Stainless mags.
2. You probably don't need small base dies.
3. You don't need to crimp.
4. 55 gr. Hornadys with cannelure are decent GP bullet at a great price.
5. Bump shoulders back about .003"
6. 65 gr Game Kings are a better GP bullet, maybe not for rodents. 1-8 is plenty.
7. There's about 20 good powders, .223/5.56 is like .308, shoots well with double base horse manure.
I like CFE 223 for heavies, 8208 for lights; Varget and TAC are keepers. I haven't tried AR Comp or 4895, they are on the list, just haven't gotten there.
8.Your 50's will probably be just fine, I've got a load for 40 gr BT and 8208 that shoots wonderfully in a 1-7. Need to shoot the Black Rifle Challenge.
9. Rem 7 1/2, CCI 450 and CCI 41 seem to be preferred due to the AR firing pin.
10. If your brass lands at about 4:00 you are gassed about right.
And finally:
Barrels will be burned.
